Circlip Plier for locking ring 1621.018, for depth stop 1621.100, 1621001 Depth stop supported by ball bearing for FAMAG-Forstner bits with exchangeable guide bushings. The depth stop is mounted on the stalk and the drilling depth has to be adjusted. This makes it possible to drill stud holes with exactly the same depth at all times. The bushings are rotatably supported by ball bearings and thus produce no disturbing marks on the workpiece surface, 1619, 162100100